How to Choose a Rod

[cutuzov]

hmm... may I ask where the line was broken? Was it anywhere close to the hook or any other knot? There should be a reason. In my opinion your original line was more then sufficient to land the fish.
By the way for next time try to pick the line within the rod recommended range. The rod you bought is rated 15-25 meaning lines within this pound test range will likely break before the rod itself under extra stress. With the 50 pound line you bought already simply keep your drag just tight enough to set the hook. After you set the hook adjust drag as needed.